The Popular Commentary by Paul E. Kretzmann - Proverbs 20:6
v. 6. Most men will proclaim every one his own goodness, literally, "Many a man meets a man of his pleasantness," for an outward show of pleasantness, an amiable exterior, is not unusual; but a faithful man, one upon whom one may depend in time of need, who can find? Such faithfulness is rare. read more
George Haydock's Catholic Bible Commentary - Proverbs 20:6
Faithful. Few continue steady to their engagements or friends, whom they will assist to a certain point. In God these two virtues always go together, Psalm lxxxiv. 11. But they are rarely found in men. (Calmet) read more